Vulnerability · Published Dec 19, 2022 · Assigned by GitHub_M
CVE-2022-23543HTML attributes when attaching a YouTube link to the post
Medium 6.3
In plain English
A medium-severity security flaw in silverwaregames-io-issue-tracker from mesosoi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Official description
Silverware Games is a social network where people can play games online. Users can attach URLs to YouTube videos, the site will generate related `<iframe>` when the post will be published. The handler has some sort of protection so non-YouTube links can't be posted, as well as HTML tags are being stripped. However, it was still possible to add custom HTML attributes (e.g. `onclick=alert("xss")`) to the `<iframe>'. This issue was fixed in the version `1.1.34` and does not require any extra actions from our members. There has been no evidence that this vulnerability was used by anyone at this time.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| mesosoi | silverwaregames-io-issue-tracker | < 1.1.34 |
Weakness: CWE-80 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L